Designation:D6342−22StandardPracticeforPolyurethaneRawMaterials:DeterminingHydroxylNumberofPolyolsbyNearInfrared(NIR)Spectroscopy1ThisstandardisissuedunderthefixeddesignationD6342;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1ThisstandardcoversapracticeforthedeterminationofhydroxylnumbersofpolyolsusingNIRspectroscopy.1.2Definitions,terms,andcalibrationtechniquesarede-scribed.Proceduresforselectingsamples,andcollectingandtreatingdatafordevelopingNIRcalibrationsareoutlined.Criteriaforbuilding,evaluating,andvalidatingtheNIRcalibrationmodelarealsodescribed.Finally,theprocedureforsamplehandling,datagatheringandevaluationaredescribed.1.3TheimplementationofthisstandardrequiresthattheNIRspectrometerhasbeeninstalledincompliancewiththemanufacturer’sspecifications.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.NOTE1—ThisstandardisequivalentISO15063.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D883TerminologyRelatingtoPlasticsD4274TestMethodsforTestingPolyurethaneRawMateri-als:DeterminationofHydroxylNumbersofPolyolsE131TerminologyRelatingtoMolecularSpectroscopyE168PracticesforGeneralTechniquesofInfraredQuanti-tativeAnalysisE222TestMethodsforHydroxylGroupsUsingAceticAnhydri...
